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SESK: Stuff Everyone Should Know · sesk.info/solar-quote-cost-per-watt

DOE says to compare solar quotes by converting each one to what number?

Cost per watt, so different system sizes can be compared fairly.

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  1. Cost per panel
  2. Cost per watt ✔
  3. Cost per roof square

Why: Quotes may cover different system sizes and panel ratings. Dividing the price by the system's watts puts every bid on the same scale.

Huh, didn't know that: DOE says different installers are likely to have different rates for the same job, so comparing quotes matters.

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References

Answer: Cost per watt. Quotes may cover different system sizes and panel ratings. Dividing the price by the system's watts puts every bid on the same scale.

  1. DOE: Choosing a Solar Installer www.energy.gov/eere/solar/articles/decisions-decisions-choosing-solar-installer
    To compare, convert your quote to cost per watt.
    Checked 2026-10-10.

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